1 Some of the changes listed in this file include issue tracking numbers
2 corresponding to tasks in the Qt Bug Tracker:
4 http://bugreports.qt-project.org/
6 Each of these identifiers can be entered in the bug tracker to obtain more
7 information about a particular change.
10 ****************************************************************************
11 * Source incompatible changes *
12 ****************************************************************************
15 - QSslCertificate::subjectInfo() and QSslCertificate::issuerInfo() now
16 return a QStringList instead of a QString
18 - QSslCertificate::isValid() has been deprecated. Originally it only checked
19 the certificate dates, but later checking for blacklisting was added. Now
20 there's a more specific QSslCertificate::isBlacklisted() method.
22 - Unite clipping support has been removed from QPainter. The alternative is
23 to unite QRegion's and using the result on QPainter.
25 - QLibrary::resolve() now returns a function pointer instead of a void
28 - QSslCertificate::alternateSubjectNames() is deprecated (but can be enabled
29 via QT_DISABLE_DEPRECATED_BEFORE), use
30 QSslCertificate::subjectAlternativeNames() instead.
32 - QLibraryInfo::buildKey() has been removed. Likewise, the QT_BUILD_KEY
33 preprocessor #define has also been removed. The build-key is obsolete
34 and is no longer necessary.
36 - QCoreApplication::translate() will no longer return the source text when
37 the translation is empty. Use lrelease -removeidentical for optimization.
39 - Qt::escape() is deprecated (but can be enabled via
40 QT_DISABLE_DEPRECATED_BEFORE), use QString::toHtmlEscaped() instead.
42 - QBool is gone. QString::contains, QByteArray::contains, and QList::contains
43 used to return an internal QBool class so that the Qt3 code
44 "if (a.contains() == 2)" wouldn't compile anymore. Such code cannot exist
45 in Qt4, so these methods return a bool now. If your code used the undocumented
46 QBool, simply replace it with bool.
49 * QMetaType::construct() has been renamed to QMetaType::create().
50 * QMetaType::unregisterType() has been removed.
53 * The plain-text, xml and lightxml test output formats have been changed to
54 show a test result for every row of test data in data-driven tests. In
55 Qt4, only fails and skips were shown for individual data rows and passes
56 were not shown for individual data rows, preventing accurate calculation
57 of test run rates and pass rates.
58 * The QTRY_VERIFY and QTRY_COMPARE macros have been moved into QTestLib.
59 These macros formerly lived in tests/shared/util.h but are now provided
60 by including the <QtTest/QtTest> header. In addition,
61 QTRY_VERIFY_WITH_TIMEOUT and QTRY_COMPARE_WITH_TIMEOUT are provided,
62 allowing for specifying custom timeout values.
63 * The QTEST_NOOP_MAIN macro has been removed from the API. If a test is
64 known at compile-time to be inapplicable for a particular build it should
65 be omitted via .pro file logic, or the test should call QSKIP in the
66 initTestCase() method to skip the entire test and report a meaningful
67 explanation in the test log.
68 * The DEPENDS_ON macro has been removed from the API. This macro did nothing
69 and misled some users to believe that they could make test functions depend
70 on each other or impose an execution order on test functions.
71 * The QTest::qt_snprintf function has been removed from the API. This was an
72 internal testlib function that was exposed in the public API due to its use
73 in a public macro. Any calls to this function should be replaced by a call
74 to qsnprintf(), which comes from the <QtCore/QByteArray> header.
75 * The QTest::pixmapsAreEqual() function has been removed from the API.
76 Comparison of QPixmap objects should be done using QCOMPARE, which provides
77 more informative output in the event of a failure.
78 * The QSKIP macro no longer has the "mode" parameter, which caused problems
79 for calculating test metrics, as the SkipAll mode hid information about
80 what test data was skipped. Calling QSKIP in a test function now behaves
81 like SkipSingle -- skipping a non-data-driven test function or skipping
82 only the current data row of a data-driven test function. Every skipped
83 data row is now reported in the test log.
85 - The QSsl::TlsV1 enum value was renamed to QSsl::TlsV1_0 .
88 * Internal QAccessible::State enum value HasInvokeExtension removed
89 - QAccessibleInterface:
90 * The "child" integer parameters have been removed. This moves the api
91 to be closer to IAccessible2.
92 This means several functions lose their integer parameter:
93 text(Text t, int child) -> text(Text t), rect(int child) -> rect()
94 setText(Text t, int child, const QString &text) -> setText(Text t, const QString &text)
95 role(int child) -> role(), state(int child) -> state()
96 * parent() and child() was added in order to do hierarchical navigation.
97 * relations() was added as a replacement to relationTo()
98 * As a consequence of the above two points, navigate() was removed.
99 * Accessible-Action related functions have been removed. QAccessibleInterface
100 subclasses are expected to implement the QAccessibleActionInterface instead.
101 These functions have been removed:
102 QAccessibleInterface::userActionCount, QAccessibleInterface::actionText,
103 QAccessibleInterface::doAction
104 - QAccessibleEvent also loses the child parameter.
105 QAccessibleEvent(Type type, int child) -> QAccessibleEvent(Type type)
106 QAccessibleEvent::child() removed.
107 - QAccessibleActionInterface:
108 * Refactored to be based on action names. All functions have been changed from using
109 int parameters to strings.
111 - QSound has been moved from QtGui to QtMultimedia
113 - QTabletEvent::QTabletEvent does not take a hiResGlobalPos argument anymore,
114 as all coordinates are floating point based now.
118 * The DeviceType enum and deviceType() have been deprecated due to
119 the introduction of QTouchDevice.
121 * The signature of the constructor has changed. It now takes a
122 QTouchDevice pointer instead of just a DeviceType value.
124 * TouchPointState no longer includes TouchPointStateMask and
125 TouchPointPrimary. QTouchEvent::TouchPoint::isPrimary() has
128 * QWidget *widget() has been removed and is replaced by QObject
129 *target() in order to avoid QWidget dependencies.
131 * QEvent::TouchCancel has been introduced. On systems where it makes
132 sense this event type can be used to differentiate between a
133 regular TouchEnd and abrupt touch sequence cancellations caused by
134 the compositor, for example when a system gesture gets recognized.
138 * Q_DECLARE_METATYPE(Foo*) now requires that Foo is fully defined. In
139 cases where a forward declared type should be used as a metatype,
140 Q_DECLARE_OPAQUE_POINTER(Foo*) can be used to allow that.
144 * The signature of the createEditor and valuePropertyName methods
145 have been changed to take arguments of type int instead of QVariant::Type.
147 - QWindowSystemInterface:
149 * The signature of all handleTouchEvent() variants have changed,
150 taking a QTouchDevice* instead of just a DeviceType value.
151 Platform or generic plug-ins have to create and register at least
152 one QTouchDevice before sending the first touch event.
154 * The event type parameter is removed from handleTouchEvent().
156 - The previously exported function qt_translateRawTouchEvent() has been removed.
157 Use QWindowSystemInterface::handleTouchEvent() instead.
159 - QAbstractEventDispatcher
161 * The signature for the pure-virtual registerTimer() has changed. Subclasses
162 of QAbstractEventDispatcher will need to be updated to reimplement the new
163 pure-virtual 'virtual void registerTimer(int timerId, int interval,
164 Qt::TimerType timerType, QObject *object) = 0;'
166 * QAbstractEventDispatcher::TimerInfo is no longer a QPair<int, int>. It is
167 now a struct with 3 members: struct TimerInfo { int timerId; int interval;
168 Qt::TimerType timerType; }; Reimplementations of
169 QAbstractEventDispatcher::registeredTimers() will need to be updated to pass
170 3 arguments to the TimerInfo constructor (instead of 2).
174 * Removed implicit conversion operator QUuid::operator QString(), instead
175 QUuid::toString() function should be used.
177 - The QHttp, QHttpHeader, QHttpResponseHeader and QHttpRequestHeader classes have
178 been removed, QNetworkAccessManager should be used instead.
180 - The QFtp class is no longer exported, QNetworkAccessManager should be used
185 * On Windows, QProcess::ForwardedChannels will not forward the output of GUI
186 applications anymore, if they do not create a console.
188 - QAbstractSocket's connectToHost() and disconnectFromHost() are now virtual and
189 connectToHostImplementation() and disconnectFromHostImplementation() don't exist.
191 - QTcpServer::incomingConnection() now takes a qintptr instead of an int.
193 - QNetworkConfiguration::bearerName() removed, and bearerTypeName() should be used.
195 - QDir::convertSeparators() (deprecated since Qt 4.2) has been removed. Use
196 QDir::toNativeSeparators() instead.
198 - QIconEngineV2 was merged into QIconEngine
199 You might need to adjust your code if it used a QIconEngine.
202 * Projects which explicitly set an empty TARGET are considered broken now.
203 * The makespec and .qmake.cache do not see build pass specific variables any more.
204 * Several functions and built-in variables were modified to return normalized paths.
206 - QTextCodecPlugin has been removed since it is no longer used. All text codecs
207 are now built into QtCore.
209 - QDir::NoDotAndDotDot is QDir::NoDot|QDir::NoDotDot therefore there is no need
210 to use or check both.
212 - QFSFileEngine, QAbstractFileEngine, QAbstractFileEngineIterator and
213 QAbstractFileEngineHandler were removed from public API and are no longer
214 exported. They may temporarily live as private implementation details, but
215 they may be altogether dropped or otherwise changed at will in the future.
218 * toShort(), toUShort(), toInt(), toUInt(), toLongLong() and toULongLong() no
219 longer take a parameter for base, they will only perform localised base 10
220 conversions. For converting other bases use the QString methods instead.
222 - QSystemLocale has been removed from the public API.
224 - QSqlQueryModel::indexInQuery() is now virtual. See note below under QSql.
226 - qMacVersion() has been removed. Use QSysInfo::macVersion() or
227 QSysInfo::MacintoshVersion instead.
229 ****************************************************************************
231 ****************************************************************************
236 - The directory structure of the qtbase unit-tests has been reworked to
237 more closely match the directory structure of the code under test.
238 Integration tests have been moved to tests/auto/integrationtests.
240 Third party components
241 ----------------------
246 ****************************************************************************
248 ****************************************************************************
252 * drop a bogus QChar::NoCategory enum value; the proper QChar::Other_NotAssigned
253 value is returned for an unassigned codepoints now.
255 * layoutAboutToBeChanged is no longer emitted by QAbstractItemModel::beginMoveRows.
256 layoutChanged is no longer emitted by QAbstractItemModel::endMoveRows. Proxy models
257 should now also connect to (and disconnect from) the rowsAboutToBeMoved and
260 * The default value of the property QSortFilterProxyModel::dynamicSortFilter was
261 changed from false to true.
263 * The signature of the virtual QAbstractItemView::dataChanged method has changed to
264 include the roles which have changed. The signature is consistent with the dataChanged
267 * QFileSystemWatcher is now able to return failure in case of errors whilst
268 altering the watchlist in both the singular and QStringList overloads of
269 addPath and removePath.
271 * QString::mid, QString::midRef and QByteArray::mid, if the position passed
272 is equal to the length (that is, right after the last character/byte),
273 now return an empty QString, QStringRef or QByteArray respectively.
274 in Qt 4 they returned a null QString or a null QStringRef.
276 * QString methods toLongLong(), toULongLong(), toLong(), toULong(), toInt(),
277 toUInt(), toShort(), toUShort(), toDouble(), and toFloat() no longer use the
278 default or system locale, they will always use the C locale. This is to
279 guarantee consistent default conversion of strings. For locale-aware conversions
280 use the equivalent QLocale methods.
282 * QDate, QTime, and QDateTime have undergone important behavioural changes:
283 * QDate only implements the Gregorian calendar, the switch to the Julian
284 calendar before 1582 has been removed. This means all QDate methods will
285 return different results for dates prior to 15 October 1582, and there is
286 no longer a gap between 4 October 1582 and 15 October 1582.
287 * QDate::setYMD() is deprecated, use QDate::setDate() instead
288 * Most methods now apply strict validity checks and will return appropriate
289 and consistent values when invalid. For example, QDate::year() will return
290 0 and QDate::shortMonthName() will return QString().
291 * Adding days to a null QDate or seconds to a null QTime will no longer return
293 * QDate stores the Julian Day as a qint64 extending date support across a
294 more interesting range, see the class documentation for details.
295 * Conversion to YMD form dates is only accurate between to 4800 BCE to
297 * The QDate::addDays() and QDateTime::addDays() methods now take a qint64
298 * The QDate::daysTo() and QDateTime::daysTo() methods now return a qint64
300 * QTextCodec::codecForCStrings() and QTextCodec::setCodecForCStrings() have both
301 been removed. This was removed due to issues with breaking other code from
302 libraries, creating uncertainty/bugs in using QString easily, and (to a lesser
303 extent) performance issues.
305 * QIntValidator and QDoubleValidator no longer fall back to using the C locale if
306 the requested locale fails to validate the input.
310 * Accessibility has been refactored. The hierachy of accessible objects is implemented via
311 proper parent/child functions instead of using navigate which has been deprecated for this purpose.
312 Table and cell interfaces have been added to qaccessible2.h
314 * Touch events and points have been extended to hold additional
315 information like capability flags, point-specific flags, velocity,
320 * QInputContext removed as well as related getters and setters on QWidget and QApplication.
321 Input contexts are now platform specific.
323 * QInputDialog::getInteger() has been obsoleted. Use QInputDialog::getInt() instead.
325 * In Qt 4, many QStyleOption subclasses were introduced in order to keep
326 binary compatibility -- QStyleOption was designed to be extended this way,
327 in fact it embeds a version number. In Qt 5 the various QStyleOption*V{2,3,4}
328 classes have been removed, and their members merged into the respective
329 base classes. Those classes were left as typedefs to keep existing code
330 working. Still, some minor adjustements could be necessary, especially in code
331 that uses QStyleOption directly and does not initialize all the members using
332 the proper Qt API: due to the version bump, QStyle will try to use the additional
333 QStyleOption members, which are left default-initialized.
337 * QHostAddress::isLoopback() API added. Returns true if the address is
338 one of the IP loopback addresses.
340 * QSslCertificate::serialNumber() now always returns the serial number in
343 * The openssl network backend now reads the ssl configuration file allowing
344 the use of openssl engines.
356 * [QTBUG-20615] Autotests can now log test output to multiple destinations
357 and log formats simultaneously.
361 QSqlTableModel/QSqlRelationalTableModel
363 * The dataChanged() signal is now emitted for changes made to an inserted
364 record that has not yet been committed. Previously, dataChanged() was
365 suppressed in this case for OnRowChange and OnFieldChange. This was probably
366 an attempt to avoid trouble if setData() was called while handling
367 primeInsert(). By emitting dataChanged(), we ensure that all views are aware
370 * While handling primeInsert() signal, the record must be manipulated using
371 the provided reference. Do not attempt to manipulate the records using the
372 model methods setData() or setRecord().
374 * removeRows() no longer emits extra beforeDelete signal for out of range row.
376 * removeRows() now requires the whole range of targetted rows to be valid
377 before doing anything. Previously, it would remove what it could and
378 ignore the rest of the range.
380 * setRecord() and insertRecord()
381 -Only use fields where generated flag is set to true. This is
382 is consistent with the meaning of the flag.
383 -Require all fields to map correctly. Previously fields that didn't
384 map were simply ignored.
385 -For OnManualSubmit, insertRecord() no longer leaves behind an empty
386 row if setRecord() fails.
388 * QSqlQueryModel::indexInQuery() is now virtual. See
389 QSqlTableModel::indexInQuery() as example of how to implement in a
392 ****************************************************************************
394 ****************************************************************************
397 ****************************************************************************
398 * Platform Specific Changes *
399 ****************************************************************************
407 * Accessibility framework uses IAccessible2
414 Qt for Embedded Linux
415 ---------------------
422 ****************************************************************************
423 * Compiler Specific Changes *
424 ****************************************************************************
427 ****************************************************************************
429 ****************************************************************************
433 * Remove qttest_p4.prf file. From now on we should explicitly enable the
434 things from it which we want. Autotest .pro files should stop using
435 'load(qttest_p4)' and start using 'CONFIG+=testcase' instead.
440 * [QTBUG-8926] [QTBUG-20440] Properties of type QStringList now have
441 translation attributes which apply to all items.
442 They are by default translatable.
451 * [QTBUG-20785] The moc now has a -b<file> option to #include an additional
452 file at the beginning of the generated file.
463 * QMAKE_MOC_OPTIONS variable is now available for passing additional parameters
473 ****************************************************************************
475 ****************************************************************************
476 - The text codecs that were previously plugins are now built into QtCore.
478 ****************************************************************************
479 * Important Behavior Changes *
480 ****************************************************************************
484 * QPointer itself is now deprecated, and the implementation of QPointer
485 has been changed to use QWeakPointer. The old guard mechanism has been
486 removed. This causes two slight changes in behavior when using
489 * When using QPointer on a QWidget (or a subclass of QWidget), previously
490 the QPointer would be cleared by the QWidget destructor. Now, the QPointer
491 is cleared by the QObject destructor (since this is when QWeakPointers are
492 cleared). Any QPointers tracking a widget will NOT be cleared before the
493 QWidget destructor destroys the children for the widget being tracked.
495 * When constructing a QSharedPointer to take ownership of an object after a
496 QPointer is already tracking the object. Previously, the shared pointer
497 construction would not be affected by the QPointer, but now that QPointer
498 is implemented using QWeakPoiner, constructing the QSharedPointer will
504 * Definition of QVariant::UserType changed. Currently it is the same as
505 QMetaType::User, which means that it points to the first registered custom
506 type, instead of a nonexistent type.
511 * The static function QMessageBox::question has changed the default argument
512 for buttons. Before the default was to have an Ok button. That is changed
513 to having a yes and a no button.